Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-18-2022, 12:49 AM
lsmalley's Avatar
Registered User
 
Join Date: Oct 2006
Location: California
Posts: 2,153
Exclamation W201 2.6L to a 3.0L

Hey guys, I have about 520k miles on my 2.6 and I have a 3.0 that I want to put in at some point. I have the 3.0 already, but before I put it in I want to make sure I have everything in order for the swap as well as clear up a few things. When swapping the motor over do I need to keep anything other than the actual motor that would prevent the car from running properly or cause a fitment issue? The reason is I want to keep everything from my 2.6 (water pump, PS pump, radiator, alternator, fuel injectors, fuel pumps, etc.) I only intend to use the actual block for this project if possible. Also, I'm going to evaluate all of the internal (bottom end and top end) of the 3.0 to decide if I need to completely replace everything there. I've never done this nor have I had an opportunity to do this so that's why I want to get it all done and get some valuable insight from those that have done it before. Even if you've made mistakes before, I'd ;like to hear it so I can know what to avoid doing. In the meantime I'll keep driving with the 2.6 while I'm getting the 3.0 prepared, maybe I'll end up reaching the 1 million milestone.

__________________

1990 190E 3.0L
Reply With Quote
  #2  
Old 05-19-2022, 12:14 PM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,293
I've thought about it, but never did it. As you probably know the 2.6 and 3.0 blocks are different. The stroke of both is the same, but the 3.0 has larger and siamesed bores, unlike, for example, a small block Chevy, which went from 327 CID to 350 with a simple increase in stroke. DB never seemed to do anything the easy way back then.

I believe the heads are also different with the 3.0 head having larger ports and valves. I don't think the 3.0 inlet manifold or air cleaner will work due to less vertical clearance under the W201 hood.

It sounds like you have both engines available for inspection, so I think all you need to do is verify that the 3.0 block has all the same threaded bores to mount all the 2.6 peripherals. The 2.6 EZL and ECU should work, especially if both are the same model year. There may have been changes in some years in the number of pins, but if only internal calibration they should be interchangeable.

Using all the 2.6 components other than the block won't get you much more top end power to the the 2.6s more restrictive inlet manifold, head, and exhaust system, but it should make noticeably more low and mid range power, which is more useful for normal driving.

Duke

Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page